EN ISO 11201:1995 声学.机械装置及设备发出的噪声.工作地点和其它试验场所声压级的测量.反射平面上基本自由声波场的工程测试法
Acoustics - Noise emitted by machinery and equipment - Measurement of emission sound pressure levels at a work station and at other specified positions - Engineering method in an essentially free field over a reflecting plane